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Lennox G26Q4-75 Ignition Control Board
The main ignition control board regulates gas flow, the igniter and the flame sensing circuits. The ignition control board was always an important device that some companies have moved to be a major component of the main board instead of a separate board.
Major clues of a dying ignition control board
- Ignition sequence declines to kick in when it receives a proper signal
- Signal from primary thermostat does not make it to the control board
- Any other problem within the furnace is explored and ends up being good
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